I gotta laugh at some of these complaints.
First of all Martin DID tell them pretty much how it ends. Martin himself is making up shyt as he goes because even he didn't have everything completely mapped out but he told them the ending.
Whether he changes things or not for the books, I'm sure he will if he actually ever finishes them.
Trying to discredit D&D is stupid.
"Oh they don't have the witty dialogue anymore". first, I disagree, the dialogue is still mostly strong. But what idiots don't take into account is that Martin spent YEARS crafting these books where D&D have a mere few months to take an outline and put it on screen.
If you think the show sucks now blame Martin for never finishing the books. He probably will never finish them you do realize that?